50 mm x 72 mm x 12 mm d1 Loyal Bones Ceramic Super REDS Skateboard Bearings

50 mm x 72 mm x 12 mm d1 Loyal Bones Ceramic Super REDS Skateboard Bearings Manufacturers , Online Wholesale 71910 ACE/HCP4AL Bearing number Suppliers‎ ! 72x50x12 Size (mm)

Bearing number 71910 ACE/HCP4AL
Size (mm) 72x50x12
Brand SKF
Bore Diameter (mm) 72
Outer Diameter (mm) 50
Width (mm) 12
d 50 mm
D 72 mm
B 12 mm
d1 56.7 mm
d2 54.9 mm
D1 65.3 mm
b 2.2 mm
C1 5.9 mm
C2 2.3 mm
C3 1.8 mm
r1,2 - min. 0.6 mm
r3,4 - min. 0.3 mm
a 21.2 mm
da - min. 53.2 mm
db - min. 52 mm
Da - max. 68.8 mm
Db - max. 70 mm
ra - max. 0.6 mm
rb - max. 0.3 mm
dn 58.4 mm
Basic dynamic load rating - C 12.1 kN
Basic static load rating - C0 8.2 kN
Fatigue load limit - Pu 0.345 kN
Limiting speed for grease lubrication 28000 r/min
Limiting speed for oil lubrication 43000 mm/min
Ball - Dw 7.144 mm
Ball - z 21
Gref 1.7 cm3
Calculation factor - e 0.68
Calculation factor - Y2 1.41
Calculation factor - Y0 0.76
Calculation factor - X2 0.67
Calculation factor - Y1 0.92
Preload class A - GA 110 N
Preload class B - GB 330 N
Preload class C - GC 660 N
Calculation factor - f 1.15
Calculation factor - f1 0.98
Calculation factor - f2A 1
Calculation factor - f2B 1.04
Calculation factor - f2C 1.08
Calculation factor - fHC 1.01
Preload class A 107 N/micron
Preload class B 161 N/micron
Preload class C 211 N/micron
r1,2 min. 0.6 mm
r3,4 min. 0.3 mm
da min. 53.2 mm
db min. 52 mm
Da max. 68.8 mm
Db max. 70 mm
ra max. 0.6 mm
rb max. 0.3 mm
Basic dynamic load rating C 12.1 kN
Basic static load rating C0 8.15 kN
Fatigue load limit Pu 0.345 kN
Attainable speed for grease lubrication 28000 r/min
Attainable speed for oil-air lubrication 43000 r/min
Ball diameter Dw 7.144 mm
Number of balls z 21
Reference grease quantity Gref 1.7 cm³
Preload class A GA 110 N
Static axial stiffness, preload class A 107 N/µm
Preload class B GB 330 N
Static axial stiffness, preload class B 161 N/µm
Preload class C GC 660 N
Static axial stiffness, preload class C 211 N/µm
Calculation factor f 1.15
Calculation factor f1 0.98
Calculation factor f2A 1
Calculation factor f2B 1.04
Calculation factor f2C 1.08
Calculation factor fHC 1.01
Calculation factor e 0.68
Calculation factor (single, tandem) Y2 0.87
Calculation factor (single, tandem) Y0 0.38
Calculation factor (single, tandem) X2 0.41
Calculation factor (back-to-back, face-to-face) Y1 0.92
Calculation factor (back-to-back, face-to-face) Y2 1.41
Calculation factor (back-to-back, face-to-face) Y0 0.76
Calculation factor (back-to-back, face-to-face) X2 0.67
Mass bearing 0.11 kg

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